Bird cage



FIG. 1 is a right elevational view of the bird cage showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a top and right side perspective view thereof, the broken line showing of the tree is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for the bird cage, as shown and described. 